KR101883584B1 - Gas supply device, hydrogen station, and gas supply method - Google Patents

Abstract

An object of the present invention is to suppress a decrease in gas pressure in the accumulator (30). The gas supply device 10 includes a first compressor 22 that compresses hydrogen gas and a second compressor 22 that is disposed downstream of the first compressor and that supplies hydrogen gas to the dispenser 12 that charges the hydrogen gas into the vehicle 14. [ A gas flow passage 16 connecting the pressure accumulator with the first compressor, the accumulator and the dispenser, and a control device 58. The gas flow passage 16 is provided with an introduction line 18a for introducing hydrogen gas into the accumulator, a derivation line 18b for deriving hydrogen gas from the accumulator, an introduction side valve 34, 38). The control device 58 is configured to allow the inlet side valve and the outlet side valve to be opened simultaneously.

Description

TECHNICAL FIELD [0001] The present invention relates to a gas supply device, a hydrogen station, and a gas supply method,

The present invention relates to a gas supply device, a hydrogen station, and a gas supply method.

BACKGROUND ART Conventionally, as disclosed in Patent Document 1, a gas supply device for temporarily storing gas supplied from a hydrogen producing device and supplying the stored gas to a dispenser is known. Specifically, in this kind of gas supply device, a hydrogen compressor and an accumulator are installed in the piping. Then, the gas introduced from the hydrogen producing apparatus is compressed by the hydrogen compressor, and the gas compressed by the hydrogen compressor is stored in the accumulator. The gas stored in the accumulator is supplied to the dispenser by the pressure difference between the gas pressure of the accumulator and the gas pressure at the dispenser side (differential pressure charging operation). As a result, during the differential pressure charging operation, the gas pressure in the accumulator gradually decreases. When the gas pressure in the accumulator falls after the differential pressure charging operation, the gas pressure in the accumulator can be restored by performing the storage operation.

There is the following problem in a configuration in which the storage operation is performed after the differential pressure charging operation to restore the gas pressure in the accumulator. That is, when the supply command from the dispenser is frequently issued or when the number of accumulators is small, the gas in the accumulator is consumed in a short period of time. Further, since the gas pressure in the accumulator is greatly lowered, it takes time until the accumulator is returned to the set pressure, and the hydrogen charging to the vehicle can not be resumed quickly.

Japanese Patent Application Laid-Open No. 2013-40648

An object of the present invention is to suppress a decrease in gas pressure in an accumulator.

According to one aspect of the present invention, there is provided a gas supply apparatus comprising: a compressor for compressing a gas; an accumulator disposed downstream of the compressor for supplying gas to a charging facility for charging a gas with a tank mounting apparatus; And a gas flow path connecting the charging device and the charging device. Wherein the gas flow path includes an introduction line for introducing gas from the compressor to the accumulator, an extraction line for drawing gas from the accumulator to the filling facility, an introduction side valve provided in the introduction line, And an outlet side valve provided on the outlet side. And the gas supply device further comprises a control device for controlling opening and closing of the introduction side valve and the introduction side valve. And the control device is configured to allow the introduction-side valve and the introduction-side valve to be in an open state at the same time.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view schematically showing an entire configuration of a gas supply apparatus according to an embodiment of the present invention; FIG.
2 is a diagram showing a flow for explaining a gas supply method by the gas supply device.
Fig. 3 is a view for explaining a transition of the gas pressure on the dispenser side at the time of gas supply by the gas supply device. Fig.
Fig. 4 is a view schematically showing an overall configuration of a gas supply apparatus according to another example.
5 is a view showing another example of the gas supply device.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

As shown in Fig. 1, the gas supply device 10 according to the present embodiment is installed in a hydrogen station, for example, as a supply stand of hydrogen gas, and supplies the hydrogen gas to the dispenser 12 in accordance with a charging command from the dispenser 12, (12) side. That is, the hydrogen station has a gas supply device 10 and a dispenser 12 connected to the outflow end of the gas supply device 10. The dispenser 12 charges the tank provided in the vehicle 14 (tank mounting apparatus) with hydrogen gas. The vehicle 14 is, for example, a fuel cell vehicle.

The gas supply device 10 includes a first compressor 22, a second compressor 24, a storage tank 26, an accumulator 30, a gas flow passage 16, a controller 58 Control device). The gas passage 16 is provided with a main passage 161 and a shorting passage 162. The main flow path 161 connects the gas supply source 20, the second compressor 24, the first compressor 22, the accumulator 30, and the dispenser 12. The short circuit 162 connects the first compressor 22 and the dispenser 12 without passing through the accumulator 30. An inflow end 16a capable of connecting the gas supply source 20 is provided at the upstream end of the main flow path 161 and an outflow end 16b capable of connecting the dispenser 12 is provided at the downstream end.

The first compressor 22 is constituted by a reciprocating compressor that reciprocates the piston by rotating a crankshaft (not shown) by motor drive (not shown). In the first compressor 22, when the hydrogen gas is compressed and the pressure in the cylinder (compression chamber) becomes equal to or higher than the pressure of the gas passage 16 on the discharge side, the discharge valve (not shown) opens and hydrogen gas is discharged. Further, the first compressor 22 is not limited to the reciprocating compressor, and may be constituted by other types of compressors.

The second compressor (24) is disposed on the upstream side of the first compressor (22) in the main flow path (161). As the second compressor 24, a small-sized compressor having a compression capacity smaller than that of the first compressor 22 may be used. The reservoir tank 26 is connected to the gas flow passage 16 through a connection passage 28 connected to a portion between the second compressor 24 and the first compressor 22 in the main flow passage 161 . In the gas supply device 10, the low-pressure hydrogen gas in the gas supply source 20 is compressed in the second compressor 24, and the gas discharged from the second compressor 24 is stored in the storage tank 26. The hydrogen gas in the storage tank 26 is sucked into the first compressor 22. Actually, various valves (not shown) are provided between the storage tank 26 and the first compressor 22 and between the storage tank 26 and the second compressor 24, The introduction of the gas and the derivation of the hydrogen gas from the storage tank 26 are controlled.

An accumulator 30 is provided at a portion between the first compressor 22 and the outlet end 16b of the main flow path 161. [ The accumulator 30 is for temporarily storing the hydrogen gas, and stores the compressed hydrogen gas in the first compressor 22. The accumulator 30 is previously replenished with hydrogen gas by the first compressor 22, and the pressure is set to a set pressure (for example, 82 MPa). In Fig. 1, the number of accumulators 30 is 1, but may be 2 or more.

The portion of the main flow path 161 through which the hydrogen gas is introduced from the first compressor 22 to the accumulator 30 located on the downstream side of the first compressor 22 is referred to as an " introduction line 18a " The portion from which the hydrogen gas is led from the accumulator 30 to the dispenser 12 is referred to as " derived line 18b ". The introduction line 18a is provided with a check valve 33, an introduction side valve 34 which is a valve member on the introduction side, and a first opening / closing valve 41. The introduction side valve 34 is constituted by an air drive valve that only changes the opening degree. The check valve 33 allows only the flow toward the accumulator 30 and prevents the flow in the direction of flow from the accumulator 30. The introduction side valve 34 may be other than the air drive valve. The first opening / closing valve 41 is disposed between the first compressor 22 and the check valve 33 and the inlet side valve 34.

The lead-out line 18b is provided with a check valve 37, a lead-out valve 38 serving as a lead-out valve member, and a second open-close valve 42. The outlet side valve 38 is constituted by an air drive valve. The check valve 37 allows only the flow in the direction of flow out of the accumulator 30 and stops the flow toward the accumulator 30. The second on-off valve 42 is disposed between the dispenser 12 and the check valve 37 and the outlet valve 38.

The short circuit path 162 of the gas passage 16 is connected to the first open / close valve 41 of the introduction line 18a, the portion between the check valve 33 and the inlet side valve 34, The two shut-off valves 42, the check valve 37 and the outlet valve 38 are short-circuited.

The return flow passage 45 is connected to the gas flow passage 16. One end of the return passage 45 is connected to a portion between the discharge portion of the first compressor 22 and the first opening and closing valve 41 and the other end is connected to the suction portion of the first compressor 22 and the connecting passage 28, As shown in Fig. The return flow path (45) is provided with a return valve (46). When the return valve 46 is opened, some or all of the hydrogen gas discharged from the first compressor 22 is returned to the upstream side of the first compressor 22. [

The gas supply device 10 is provided with a first pressure sensor 48, which is a pressure detection part. The first pressure sensor 48 is disposed on the short-circuit path 162. The pressure of the hydrogen gas measured by the first pressure sensor 48 corresponds to the pressure in the accumulator 30.

The controller 58 controls the driving of the first compressor 22 and the second compressor 24 and controls the opening and closing of the first opening and closing valve 41, the second opening and closing valve 42, the inlet side valve 34, And controls the opening and closing of the side valve (38) and the return valve (46).

The dispenser 12 is provided with a supply path 52 for connecting the adapter 51 and the outlet end 16b of the adapter 51 and the gas flow path 16 and a flow control valve 53 And a second pressure sensor 54, which is a pressure detecting portion. The adapter 51 is installed in the gas supply port of the vehicle 14 when the hydrogen gas is supplied. The flow control valve 53 is constituted by an air drive valve. Also, a flow control valve other than the air drive valve may be used. A controller (not shown) is provided in the dispenser 12, and the controller controls the opening degree of the flow control valve 53 on the basis of the detection value of the second pressure sensor 54. In the following description, when the area downstream of the flow control valve 53 of the dispenser 12 and the vehicle 14 are described together, it is referred to as " demand part ".

In the gas supply device 10, the first compressor 22 and the accumulator 30 are connected in series in the main flow path 161. The introduction side valve 34 and the discharge side valve 38 are opened so that the gas supply device 10 is in a state in which hydrogen gas can be introduced into the accumulator 30 through the introduction line 18a from the first compressor 22 And hydrogen gas can be drawn from the accumulator 30 to the dispenser 12 through the derived line 18b. Hereinafter, the operation mode of the gas supply device 10, which enables both the introduction of the hydrogen gas into the accumulator 30 and the withdrawal of the hydrogen gas from the accumulator 30, is referred to as "serial differential pressure charging operation". That is, the controller 58 causes the inlet-side valve 34 and the outlet-side valve 38 to be simultaneously opened, and introduces the hydrogen gas into the accumulator 30 to thereby derive the hydrogen gas from the accumulator 30 The operation mode can be executed.

Since the gas supply device 10 is connected to the dispenser 12 via the short circuit 162 (i.e., without passing through the accumulator 30), the introduction side valve 34 and the outlet side valve 38 The entire amount of the hydrogen gas discharged from the first compressor 22 can be directly sent to the dispenser 12. Hereinafter, the operation mode of the gas supply device 10 for delivering the hydrogen gas from the first compressor 22 to the dispenser 12 without interposing the accumulator 30 is referred to as " direct charge operation ". In other words, the controller 58 is capable of executing an operation mode in which the first compressor 22 is driven in a state in which the inlet-side valve 34 and the outlet-side valve 38 are simultaneously closed.

The gas supply device 10 is operated to supply hydrogen gas from the accumulator 30 to the dispenser 12 in a state where the delivery of the hydrogen gas from the first compressor 22 to the accumulator 30 is stopped . Hereinafter, this operation mode is referred to as " differential pressure charge operation " separately from the above-described series differential pressure charge operation. In other words, the controller 58 can execute the operation mode in which the introduction side valve 34 is closed and the extraction side valve 38 is opened.

The controller 58 of the gas supply device 10 is capable of switching between the series of differential pressure charging operation, direct charging operation and differential pressure charging operation.

3 is a diagram illustrating the relationship between the pressure of the hydrogen gas and the time in the demand portion. The straight lines 92 and 93 shown by the solid line illustrate the pressure temporal transition of the hydrogen gas in the demand portion, and the line 91 shown by the broken line shows the temporal change of the target pressure of the hydrogen gas. In Fig. 3, the starting point of time when hydrogen is charged into the vehicle 14 is set as the origin. In the convenience of the drawing, portions having the same slopes of straight lines 91 to 93 are shown shifted up and down.

In the hydrogen station, the pressure of the hydrogen gas in the demand portion is controlled to increase in accordance with the target pressure indicated by a straight line 91 in Fig. 3, and the tank of the vehicle 14 is controlled to the final pressure Pt ( For example, 70 MPa).

Here, the operation control of the gas supply device 10 according to the present embodiment will be described with reference to Fig. A gas supply method for supplying hydrogen gas to the dispenser 12 is performed by operating the gas supply device 10 as follows. The storage of the hydrogen gas into the storage tank 26 by the second compressor 24 is intermittently performed based on the pressure of the hydrogen gas in the storage tank 26. [ In the following description, the operation of the apparatus on the downstream side of the second compressor 24 and the storage tank 26 of the gas supply apparatus 10 will be described.

The gas supply to the dispenser 12 is started when a gas supply command is issued from the dispenser 12 to the gas supply device 10. [ When the gas supply command is issued, the controller 58 starts the first compressor 22 first. Until the first compressor 22 becomes a standby state, that is, the state in which the hydrogen gas can be delivered to the introduction line 18a of the gas flow passage 16, the controller 58 controls the first opening / 41 is closed, and the return valve 46 is opened. The hydrogen gas is not substantially compressed by the first compressor 22 but circulates between the first compressor 22 and the return flow path 45. [ While the first compressor 22 is in the standby state, the controller 58 of the gas supply device 10 opens the outlet side valve 38 and the second opening / closing valve 42 to perform the differential pressure charging operation (Step ST11). At this time, the inlet side valve 34 is closed. In the dispenser 12, the opening degree of the flow control valve 53 is controlled so that the detection result of the second pressure sensor 54 becomes the target pressure. 3, the pressure of the hydrogen gas in the demand portion gradually increases in accordance with the target pressure indicated by the straight line 91. As a result,

When the first compressor 22 is in the standby state, the controller 58 opens the first on-off valve 41 and the introduction side valve 34 of the introduction line 18a and closes the return valve 46 . Thereby, the operation of the gas supply device 10 shifts to the serial differential pressure charging operation (step ST12). The first compressor 22 delivers the hydrogen gas to the introduction line 18a of the gas flow passage 16. Further, the return valve 46 need not be completely closed, but the flow rate of the hydrogen gas discharged from the first compressor 22 may be adjusted by adjusting the opening degree.

When the part of the main flow path 161 downstream of the first compressor 22 and the shorting path 162 (hereinafter collectively referred to as "downstream part 161a") and the accumulator 30 are identified as one system , And in the serial differential pressure charging operation, hydrogen gas is supplied to the dispenser 12 by the pressure difference between the system and the demand part. Further, the flow rate of the hydrogen gas is controlled by the flow control valve 53, so that the pressure of the hydrogen gas in the demand portion (see the straight line 92 in FIG. 3) gradually increases in accordance with the target pressure.

In the series differential pressure charging operation, the pressure of the hydrogen gas in the downstream portion 161a and the accumulator 30 is set to a predetermined pressure (for example, 82 MPa) on the basis of the detection value of the first pressure sensor 48, ) Controls the number of revolutions of the first compressor (22). The data obtained by processing the detection value of the first pressure sensor 48 may be used to control the number of revolutions of the first compressor 22. [ Thus, even if the differential pressure charging operation is performed in advance, the pressure in the accumulator 30 rapidly increases, and the pressure of the downstream portion 161a and the accumulator 30 is kept constant. However, when the flow rate of the hydrogen gas required from the dispenser 12 (hereinafter referred to as the " required amount ") exceeds the upper limit of the flow rate that can be delivered from the first compressor 22 , The difference between the required amount and the upper limit amount is derived from the accumulator 30 to the dispenser 12 and the pressure in the accumulator 30 and the downstream portion 161a is lowered. The pressure of the hydrogen gas in the accumulator 30 (in other words, the amount of the hydrogen gas) is increased or decreased according to the relationship between the flow rate of the hydrogen gas sent out from the first compressor 22 and the required amount required by the dispenser 12 do.

When the tank in the vehicle 14 reaches the final pressure Pt (see Fig. 3), the filling of the hydrogen gas from the dispenser 12 to the vehicle 14 is stopped, The supply of the hydrogen gas to the fuel cell 12 is also stopped. Depending on the size of the tank of the vehicle 14, a direct charging operation, which will be described later, is performed.

As described above, by performing the series differential pressure charging operation in the gas supply device 10, a decrease in the pressure of the accumulator 30 is suppressed compared with the case where only the differential pressure charging operation is performed. This makes it possible to shorten the time required to raise the accumulator 30 to the set pressure, that is, the so-called recovery time, and to quickly start charging the hydrogen gas into the next vehicle 14.

However, as already described, when the amount demanded from the dispenser 12 exceeds the upper limit amount of the first compressor 22 during the filling of the hydrogen gas into the vehicle 14, the downstream portion 161a and the accumulator 30 is lowered. Particularly, in the case of the vehicle 14 having a large capacity of the tank, a large amount of hydrogen gas is required, so that the pressure of the downstream portion 161a and the accumulator 30 is greatly lowered. When the pressure in the downstream portion 161a and the accumulator 30 is lowered to the vicinity of the final pressure (full-charge pressure) in the tank of the vehicle 14, the downstream portion 161a and the accumulator 30 ) And the demand part becomes excessively small. As a result, as shown by the straight line 93 in FIG. 3, the pressure of the hydrogen gas in the demand portion may be significantly lower than the target pressure.

Therefore, when the difference? P (i.e., the pressure difference) between the detection value P1 of the first pressure sensor 48 and the detection value P2 of the second pressure sensor 54 becomes equal to or smaller than the set value A (step ST13) 58 close the inlet side valve 34 while opening the first on-off valve 41 and the second on-off valve 42 to block the inflow of hydrogen gas into the accumulator 30. Thereby, the operation of the gas supply device 10 shifts to the direct charging operation (step ST14). As a result, the entire amount of the hydrogen gas is sent from the first compressor 22 to the dispenser 12 through the short circuit 162. The controller 58 controls the number of revolutions of the first compressor 22 so that the detection value of the second pressure sensor 54 becomes the target pressure. Therefore, the pressure of the hydrogen gas in the demand portion increases in accordance with the target pressure. Further, the data obtained by processing the detection value of the second pressure sensor 54 may be compared with the target pressure so that the rotation speed control of the first compressor 22 may be performed.

When the tank in the vehicle 14 reaches the final pressure Pt, the filling of the hydrogen gas from the dispenser 12 to the vehicle 14 is stopped.

In the gas supply device 10, the first compressor 22 in the main flow path 161 is connected in series to the accumulator 30, although the embodiment of the present invention has been described above. The inlet side valve 34 and the outlet side valve 38 are opened so that hydrogen gas can be introduced into the accumulator 30 from the first compressor 22 and the hydrogen gas can be introduced from the accumulator 30 to the dispenser 12 Hydrogen gas can be drawn out. This makes it possible to suppress a decrease in the pressure in the accumulator 30 during driving of the gas supply device 10 as compared with the gas supply device that performs only the differential pressure charging operation. As a result, the recovery time of the accumulator 30 can be shortened, and the filling of the hydrogen gas into the next vehicle 14 can be started quickly.

In the series differential pressure charging operation, the rotational speed of the first compressor (22) is controlled so that the pressure of the hydrogen gas in the downstream portion (161a) is maintained at the set pressure based on the detection result of the first pressure sensor (48). As a result, the lowering of the pressure of the hydrogen gas in the downstream portion 161a and the accumulator 30 is further suppressed. It is also easy to control the pressure (or flow rate) of the hydrogen gas by the flow control valve 53 by maintaining the pressure of the downstream portion 161a and the accumulator 30 located on the upstream side of the dispenser 12 constant. It becomes.

In the present embodiment, hydrogen gas is delivered from the accumulator 30 to the dispenser 12 before the first compressor 22 is brought into the standby state. As a result, the hydrogen gas can be quickly charged into the vehicle 14 brought into the hydrogen station.

By providing the short-circuit path 162 in the gas flow passage 16, it is possible to easily switch from the series differential pressure charging operation to the direct charging operation. In the direct charging operation, the rotational speed of the first compressor (22) is controlled based on the detection result of the second pressure sensor (54), so that the pressure of the hydrogen gas in the demand portion can be increased in accordance with the target pressure.

The hydrogen gas in the gas supply source 20 is compressed using the second compressor 24 which is a compressor other than the first compressor 22 in the gas supply device 10 and the compressed hydrogen gas is supplied to the storage tank 26, . The compression ratio in the first compressor 22 (that is, the pressure ratio between the suction side and the discharge side) can be suppressed by using the stored gas by the first compressor 22. [ Therefore, the first compressor 22 can be downsized.

In the gas supply device 10, the ratio of the detected value P1 of the first pressure sensor 48 to the detected value P2 of the second pressure sensor 54 (that is, P1 The controller 58 may shut off the flow of hydrogen gas from the first compressor 22 to the accumulator 30 by closing the inlet side valve 34. In this case, As described above, opening and closing of the inlet side valve 34 may be performed based on various calculations, as long as the operation is directly shifted to the charging operation based on the pressure change between the first pressure sensor 48 and the second pressure sensor 54 .

As another example of opening / closing control of the introduction side valve 34 when shifting from the series differential pressure charging operation to the direct charging operation, the detection value P2 of the second pressure sensor 54 is set to a value Pd The controller 58 may close the inlet side valve 34 and shut off the flow of the hydrogen gas from the first compressor 22 to the accumulator 30. [ The controller 58 may open and close the introduction side valve 34 based on whether or not the difference between the target pressure Pm and the detected value P2 is a set value. Further, the controller 58 may open and close the introduction side valve 34 based on the ratio of the detected value P2 to the target pressure Pm. As described above, opening and closing of the inlet side valve 34 may be performed based on various calculations, as long as the direct charging operation shifts to the charging operation based on the change of the detected value of the second pressure sensor 54 with respect to the target pressure Pm.

The present invention is not limited to the above-described embodiments, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, as shown in Fig. 4, the short circuit 162 may be omitted. Even in this case, since the first compressor 22 is connected in series to the accumulator 30, the introduction side valve 34 and the outlet side valve 38 are opened so that the introduction of hydrogen gas into the accumulator 30 And it is also possible to derive the hydrogen gas from the accumulator 30 to the dispenser 12. As a result, it is possible to suppress the pressure drop in the accumulator (30) during operation of the gas supply device (10).

In the above embodiment, when the first compressor 22 is in the standby state at the time when the vehicle 14 is loaded, the differential pressure charging operation does not necessarily have to be performed.

The first pressure sensor 48 may be disposed between the downstream portion 161a of the main flow passage 161 and more specifically between the first compressor 22 and the first opening and closing valve 41 in the above embodiment. In this case, the pressure corresponding to the pressure of the accumulator 30 is measured by the first pressure sensor 48. Also, the first pressure sensor 48 may be directly installed in the accumulator 30. [ In this case, the first pressure sensor 48 is configured to detect the pressure in the accumulator 30.

The introduction line 18a and the derived line 18b may be constituted by one pipe 18 as shown in Fig. In this case, the pipe 18 is provided with a valve member 39 such as an open / close valve.

Although the second compressor 24 and the reservoir tank 26 are provided in the above embodiment, the hydrogen gas may be directly sent from the gas supply source 20 to the first compressor 22, omitting these. The gas supply device 10 may be used for charging hydrogen gas to a tank mounting apparatus other than a vehicle. The gas supply device may be used for supplying a gas other than hydrogen gas.

Here, the above embodiment will be schematically described.

(1) In the above embodiment, since the compressor is connected in series to the accumulator, the gas can be introduced into the accumulator, and the gas can be led from the accumulator to the charging facility. By supplying the gas to the compressor, it is possible to suppress the pressure drop in the accumulator during operation of the gas supply device. As a result, the recovery time of the accumulator can be shortened, and the charging of the gas to the next tank mounting apparatus can be started quickly.

(2) The gas supply device may include a pressure detection unit for detecting a pressure in the accumulator or a pressure corresponding thereto. In this case, the control device may control the number of revolutions of the compressor so that the pressure of the gas is maintained at the predetermined pressure, based on the detection result of the pressure detecting section, when the compressor delivers the gas to the gas circulation path.

In this configuration, it is possible to further suppress the pressure drop in the accumulator. As a result, supply control of the gas from the charging facility to the vehicle becomes easier.

(3) The gas distribution system according to any one of (1) to (3), wherein the gas flow path includes a main flow path including the introduction line and the derived line and connecting the compressor, the accumulator and the charging facility, A short circuit may be provided to short-circuit the introduction line and the derived line so that gas can be sent. Further, the charging equipment may be provided with another pressure detecting unit. In this case, the control device closes the introduction-side valve based on the pressure change between the pressure detection section and the other pressure detection section, and controls the rotation number of the compressor based on the detection result of the other pressure detection section You can.

In this configuration, gas can be directly supplied from the compressor to the charging equipment in a state where the inflow of gas from the compressor to the accumulator is blocked (direct charging operation). As a result, the entire amount of the gas discharged from the compressor is supplied to the charging facility, and the flow rate (or pressure) of the gas charged in the tank mounting apparatus is secured from the charging facility.

(4) The gas distribution system according to any one of (1) to (4), wherein the gas flow path includes a main flow path including the introduction line and the derived line and connecting the compressor, the accumulator and the charging facility, A short circuit may be provided to short-circuit the introduction line and the derived line so that gas can be sent. Further, the charging equipment may be provided with another pressure detecting unit. In this case, the control device closes the introduction-side valve based on a change in the detected value of the other pressure detection section with respect to the target pressure of the gas in the charging facility, The number of revolutions of the compressor may be controlled based on the number of revolutions of the compressor.

In this configuration, gas can be directly supplied from the compressor to the charging equipment in a state where the inflow of gas from the compressor to the accumulator is blocked (direct charging operation). As a result, the entire amount of the gas discharged from the compressor is supplied to the charging facility, and the flow rate (or pressure) of the gas charged in the tank mounting apparatus is secured from the charging facility.

(5) The control device may be configured to bring the introduction-side valve into a closed state and bring the introduction-side valve into an open state. In this embodiment, the gas can be supplied to the charging facility by the differential pressure charging operation.

(6) The gas supply device may further comprise another compressor for compressing the gas of the gas supply source, and a storage tank for storing the gas discharged from the other compressor. In this case, the compressor may suck the gas in the storage tank.

In this mode, the gas discharged from the other compressor is stored in the storage tank, and the stored gas is compressed in the compressor. As a result, the compression ratio in the compressor can be suppressed. Therefore, the compressor can be downsized.

(7) In the above-described embodiment, the gas supply device and the charging device connected to the outlet end of the gas supply device are provided, and the charging device charges the tank mounting device with the hydrogen gas supplied from the gas supply device Hydrogen station.

(8) The above-described embodiment is a gas supply method by a gas supply device, wherein the gas supply device comprises: a compressor for compressing a gas; and a gas supply device disposed downstream of the compressor, And a gas flow passage for connecting the compressor, the accumulator and the charging facility, wherein gas is introduced into the accumulator from the compressor, and gas is introduced from the accumulator to the charging facility And a gas supply method.

In the above embodiment, since the compressor is connected in series to the accumulator, it is possible to introduce gas into the accumulator, and it is also possible to derive the gas from the accumulator to the charging facility. By supplying the gas to the compressor, it is possible to suppress the pressure drop in the accumulator during operation of the gas supply device. As a result, the recovery time of the accumulator can be shortened, and the charging of the gas to the next tank mounting apparatus can be started quickly.

(9) The gas flow passage may be disposed downstream of the compressor. In this case, the gas supply method may control the number of revolutions of the compressor so that the pressure of the gas is maintained at a predetermined pressure, based on the detection result of the pressure detection unit, when the compressor delivers the gas to the gas flow path.

In this configuration, it is possible to further suppress the pressure drop in the accumulator. As a result, supply control of the gas from the charging facility to the vehicle becomes easier.

(10) The gas supply method may block the flow of gas from the compressor to the accumulator based on a change in pressure between the pressure detector and another pressure detector installed in the charging equipment. Further, the number of revolutions of the compressor may be controlled based on the detection result of the other pressure detecting unit, and the gas may be sent from the compressor to the charging facility without passing through the accumulator.

In this configuration, gas can be directly supplied from the compressor to the charging facility in a state where the inflow of gas from the compressor to the accumulator is blocked (direct charging operation). As a result, the entire amount of the gas discharged from the compressor is supplied to the charging facility, and the flow rate (or pressure) of the gas charged in the tank mounting apparatus is secured from the charging facility.

(11) In the gas supply method, a flow of gas from the compressor to the accumulator based on a change in the detected value of another pressure detecting portion provided in the charging equipment with respect to a target pressure of gas in the charging equipment It may be blocked. In this case, the rotation speed of the compressor may be controlled on the basis of the detection result of the other pressure detecting unit, and the gas may be sent from the compressor to the charging facility without passing through the accumulator.

(12) In the gas supply method, the gas may be delivered from the accumulator to the charging facility before the compressor is ready to discharge the gas to the introduction line. In this configuration, the gas can be quickly supplied to the charging facility.

(13) The gas supply method according to any one of the above modes (1) to (3), further comprising: another compressor for compressing the gas of the gas supply source; and a storage tank for storing the gas discharged from the other compressor, .

As described above, according to the above embodiment, it is possible to suppress the gas pressure in the accumulator from being lowered.

Claims (13)

A compressor for compressing the gas,
An accumulator disposed downstream of the compressor for supplying gas to a charging facility for charging the tank with a tank of the tank mounting apparatus,
A gas flow path connecting the compressor, the accumulator, and the charging facility;
And a pressure detecting section for detecting a pressure in the accumulator or a pressure corresponding thereto,
Wherein the gas flow passage comprises:
An introduction line for introducing gas from the compressor to the accumulator;
A derivation line for deriving the gas from the accumulator to the filling facility,
An introduction side valve provided in the introduction line,
And an outlet side valve provided in the derived line,
The gas supply device further comprises a control device for controlling opening and closing of the introduction side valve and the output side valve,
The control device opens the inlet side valve so that the gas can be introduced into the accumulator from the compressor through the introduction line and further draws gas from the accumulator through the derived line to the charging facility Side valve is opened so that the gas can be supplied to the charging facility while driving the compressor,
During the running of the operation mode, the pressure in the accumulator or the pressure on the downstream side of the accumulator is maintained at the set pressure during charging until the tank reaches the final pressure, based on the detection result of the pressure detector And controls the number of revolutions of the compressor so that the number of revolutions of the compressor is reduced. delete The gas-liquid separator according to claim 1,
A main flow path including the introduction line and the derived line and connecting the compressor, the accumulator, and the charging facility,
And a short-circuit line which short-circuits the introduction line and the derived line,
The charging apparatus is provided with another pressure detecting section,
The control device includes:
Closing the introduction line on the basis of a pressure change between the pressure detecting section and the other pressure detecting section to block the flow of gas from the compressor to the accumulator,
And controls the number of revolutions of the compressor based on the detection result of the other pressure detection unit, and sends the gas from the compressor to the charging facility via the short-circuit. The gas-liquid separator according to claim 1,
A main flow path connecting the compressor, the accumulator, and the charging facility, the main flow path including the introduction line and the derived line being different lines,
And a short-circuit line which short-circuits the introduction line and the derived line,
The charging apparatus is provided with another pressure detecting section,
The control device includes:
Closing the introduction line based on a change in the detected value of the other pressure detection unit with respect to the target pressure of the gas in the charging facility to block the flow of gas from the compressor to the accumulator,
And controls the number of revolutions of the compressor based on the detection result of the other pressure detection unit, and sends the gas from the compressor to the charging facility via the short-circuit. 2. The control apparatus according to claim 1, wherein the introduction line and the derived line are constituted by one pipe, the introduction side valve and the introduction side valve are constituted by one valve member, The valve member of the gas supply device can be brought into the open state. 2. The compressor according to claim 1, further comprising: another compressor for compressing the gas of the gas source;
Further comprising a storage tank for storing the gas discharged from the other compressor,
And the compressor sucks the gas of the storage tank. A gas supply apparatus as claimed in any one of claims 1 to 10,
And a charging device connected to an outlet end of the gas supply device,
Wherein the charging facility charges the tank mounting device with the hydrogen gas supplied from the gas supply device. A gas supply method by a gas supply apparatus,
Wherein the gas supply device comprises:
A compressor for compressing the gas,
An accumulator disposed downstream of the compressor for supplying gas to a charging facility for charging the tank with a tank of the tank mounting apparatus,
A gas flow path connecting the compressor, the accumulator, and the charging facility;
And a pressure detecting section for detecting a pressure in the accumulator or a pressure corresponding thereto,
Wherein the gas flow passage comprises:
An introduction line for introducing gas from the compressor to the accumulator;
A derivation line for deriving the gas from the accumulator to the filling facility,
An introduction side valve provided in the introduction line,
And an outlet side valve provided in the derived line,
Side valve is opened so that the gas can be introduced into the accumulator from the compressor through the introducing line, and the inlet valve is opened from the accumulator through the introduction line, Side valve is opened to execute an operation mode in which gas is supplied to the charging facility while driving the compressor,
In the operation mode, during the charging period until the tank reaches the final pressure, the pressure in the accumulator or the pressure in the downstream side of the accumulator is maintained at the set pressure, based on the detection result of the pressure detector. And controlling the number of revolutions of the gas supply device. delete 9. The fuel cell system according to claim 8, wherein a flow of gas from the compressor to the accumulator is blocked based on a change in pressure between the pressure detecting portion and another pressure detecting portion provided in the charging equipment,
And controls the number of revolutions of the compressor based on the detection result of the other pressure detection unit and sends the gas from the compressor to the charging facility without passing through the accumulator. 9. The charging device according to claim 8, wherein the flow of gas from the compressor to the accumulator is blocked based on a change in the detected value of another pressure detecting portion provided in the charging equipment with respect to a target pressure of gas in the charging equipment,
And controls the number of revolutions of the compressor based on the detection result of the other pressure detection unit and sends the gas from the compressor to the charging facility without passing through the accumulator. 9. The apparatus according to claim 8, wherein the introduction line and the derived line are constituted by one piping, the introduction side valve and the introduction side valve are constituted by one valve member,
And in the operation mode, the one valve member is opened to discharge the gas to the charging facility. 9. The compressor of claim 8, further comprising: another compressor for compressing the gas of the gas source;
Further comprising a storage tank for storing the gas discharged from the other compressor,
And the compressor sucks the gas of the storage tank.

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